Question

ratio of number of girls to boys is 2:5 . if number of bous is 225. find number of students in school

Answer 1

As 5 parts of 225 = 45*5
Then 2 parts =45*2= 90

Answer 2

let us take the ratio factor as x , so we have 2x and 5x

no. of boys =225

= 5x = 225

x= 45

2x = 2 ×45

=90

hence , no. of students ;

= 90+225

315 students